Loved by over 2.2 million students

Over 90%
improved by at least one letter grade.

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California

Description

Chapter 12 Development over the Lifespan Developmental psych examines changes in our biological, physical, psychological, and behavioural processes as we age Research designs used: Cross sectional design compare people of different ages at same point in time o Quick o Drawback people grow up in different historical ages, ex. Are young people actually smarter than old ones or is it just that the old people grew up in poorer environments (less education, less medical care, etc. In 1950s) Longitudinal design repeatedly test same cohort as they age o Ensures everyone exposed to same historical time frame o Time consuming o Some people die, drop out of study, etc. o Some things can be unique to cohort Sequential design combines the 2, repeadetly test several age cohorts as they grow older o Best one o Time consuming PRENATAL DEVELOPMENT 3 stages Germinal stage first two weeks, begins with sperm fertilizing egg making a zygote o After many divisions, becomes a mass of cells and attaches to uterus after about 2 weeks Embryonic stage 2 to 8 weeks after conception o Mass of cells called embryo o Placenta forms allows nutrient flow from blood to umbilical cord o Umbilical cord blood vessels that carry nutrients and oxygen to embryo, and waste products from embryo to mother o Organs develop, heart starts beating, brain starts forming, features begin Fetal stage after 9 weeks o Muscles become stronger, development o 24 weeks eyes open o 28 weeks age of viability Genetics and Sex Determination Sperm and egg have 23 chromosomes Zygote has 23 pairs of chromosomes